[Bug 883109] Re: Grub2: "grub-probe: warn: Discarding improperly nested partition"

Mate Kukri 883109 at bugs.launchpad.net
Thu Jun 27 10:43:10 UTC 2024 

All operating systems mentioned here are essentially of purely
historical interest at this point.

If you are still experiencing a similar issue on modern Ubuntu please
feel free to report a new bug.

** Changed in: grub2 (Ubuntu)
       Status: Confirmed => Won't Fix

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https://bugs.launchpad.net/bugs/883109

Title:
  Grub2: "grub-probe: warn: Discarding improperly nested partition"

Status in grub2 package in Ubuntu:
  Won't Fix

Bug description:
  This machine does not have the horse power for VMs, so its got 9 OS in
  spread across 2 disks. On the second disk, OpenBSD, FreeBSD and
  Solaris are all primary (plus one unused primary).

  ===========================

  # cd /boot/
  # ls
  abi-2.6.38-12-generic         memtest86+_multiboot.bin
  config-2.6.38-12-generic      System.map-2.6.38-12-generic
  grub                          vmcoreinfo-2.6.38-12-generic
  initrd.img-2.6.38-12-generic  vmlinuz-2.6.38-12-generic
  memtest86+.bin
  # update-grub2
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Generating grub.cfg ...
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found linux image: /boot/vmlinuz-2.6.38-12-generic
  Found initrd image: /boot/initrd.img-2.6.38-12-generic
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found memtest86+ image: /boot/memtest86+.bin
  Found Windows Vista (loader) on /dev/sda1
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found Fedora release 14 (Laughlin) on /dev/sda10
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found Fedora release 15 (Lovelock) on /dev/sda8
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found Ubuntu 11.10 (11.10) on /dev/sda9
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found unknown Linux distribution on /dev/sdb1
  Found unknown Linux distribution on /dev/sdb14
  Found unknown Linux distribution on /dev/sdb17
  Found unknown Linux distribution on /dev/sdb5
  done
  root at germain:/boot#

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